/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000-2003 Lucas Bruand.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "jviewcvs" and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
/*
 *  Original description of rcsfile can be found: http://www.daemon-systems.org/man/rcsfile.5.html
 */
//----------------------------------------------------------------------------
// The JRCS parser
//----------------------------------------------------------------------------

// $antlr-format alignTrailingComments true, columnLimit 150, minEmptyLines 1, maxEmptyLinesToKeep 1, reflowComments false, useTab false
// $antlr-format allowShortRulesOnASingleLine false, allowShortBlocksOnASingleLine true, alignSemicolons hanging, alignColons hanging

grammar RCS;

rcstext
    : admin deltalist desc deltatextlist EOF
    ;

rcsheader
    : admin
    ;

rcsrevisions
    : admin deltalist
    ;

admin
    : head (branch)? access symbols (locks)? (strict)? (comment)? (expand)? (newphrase)*
    ;

head
    : LITERAL_HEAD REVISION SEMI
    ;

branch
    : LITERAL_BRANCH REVISION SEMI
    ;

access
    : LITERAL_ACCESS (IDENT)* SEMI
    ;

symbols
    : LITERAL_SYMBOLS (tags)* SEMI
    ;

tags
    : IDENT COLON REVISION
    ;

locks
    : LITERAL_LOCKS (IDENT)* SEMI
    ;

strict
    : LITERAL_STRICT SEMI
    ;

comment
    : LITERAL_COMMENT (STRING)? SEMI
    ;

expand
    : LITERAL_EXPAND (STRING)? SEMI
    ;

deltalist
    : (delta)*
    ;

delta
    : REVISION delta_date delta_author delta_state delta_branches delta_next (newphrase)*
    ;

delta_date
    : LITERAL_DATE REVISION SEMI
    ;

delta_author
    : LITERAL_AUTHOR IDENT SEMI
    ;

delta_state
    : LITERAL_STATE IDENT SEMI
    ;

delta_branches
    : LITERAL_BRANCHES (REVISION)* SEMI
    ;

delta_next
    : LITERAL_NEXT (REVISION)? SEMI
    ;

desc
    : LITERAL_DESC STRING
    ;

deltatextlist
    : (deltatext)*
    ;

deltatext
    : REVISION deltatext_log (newphrase)* deltatext_text
    ;

deltatext_log
    : LITERAL_LOG STRING
    ;

deltatext_text
    : LITERAL_TEXT STRING
    ;

newphrase
    : (IDENT)+ SEMI
    ;

COMMA
    : 'COMMA'
    ;

LOGS
    : 'LOGS'
    ;

ADMIN
    : 'ADMIN'
    ;

DELTAS
    : 'DELTAS'
    ;

LITERAL_HEAD
    : 'head'
    ;

LITERAL_BRANCH
    : 'branch'
    ;

LITERAL_ACCESS
    : 'access'
    ;

LITERAL_SYMBOLS
    : 'symbols'
    ;

LITERAL_LOCKS
    : 'locks'
    ;

LITERAL_STRICT
    : 'strict'
    ;

LITERAL_COMMENT
    : 'comment'
    ;

LITERAL_EXPAND
    : 'expand'
    ;

LITERAL_DATE
    : 'date'
    ;

LITERAL_AUTHOR
    : 'author'
    ;

LITERAL_STATE
    : 'state'
    ;

LITERAL_BRANCHES
    : 'branches'
    ;

LITERAL_NEXT
    : 'next'
    ;

LITERAL_DESC
    : 'desc'
    ;

LITERAL_LOG
    : 'log'
    ;

LITERAL_TEXT
    : 'text'
    ;

// an identifier.  Note that testLiterals is set to true!  This means
// that after we match the rule, we look in the literals table to see
// if it's a literal or really an identifer

IDENT
    : (~ ( '$' | ',' | '.' | ':' | ';' | '@' | ' ' | '\t' | '\n' | '\r' | '\f'))+
    ;

INT
    : ('0' .. '9')+
    ;

REVISION
    : INT ('.' INT)*
    ;

STRING
    : '@' (~[@] | '@@')* '@'
    ;

SEMI
    : ';'
    ;

COLON
    : ':'
    ;

// Whitespace -- ignored

WS
    : (' ' | '\t' | '\f' | ( '\r\n' | '\r' | '\n'))+ -> skip
    ;